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TELEPHONE. No. 344,153. PatentedJune 22, `1886.

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J. J. BARRIER & F. T. DB LAVERNDE.

TELEPHONE.

No. 344.153. Ptentd June 22, 1886.

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JULES JOAS BARRIER AND FERDINAND TOURVIEILLE DE LAVERNEDE, OF

PARTS, FRANCE.

TELEPHONE.

FEGIEICATIQN forming part of Letters Patent No. 344,153, dated June 22, 1886,

Application filed September i, 1892. Serial No. 70,856. (No model.) Patented in France .Tuly 25, 1882, No. 1:' 266; in Belgium July 31, 1882, No.58,628, and in England August 8, 188i', No. 3,763.

To a/ZZ whom it may concern: l within the same. Surrounding the outer se- Be it known that we, JULES Joris BARRIER ries of coils is a ilanged tube, 7z,which maybe and FERDINAND ToUnvlEiLLE DE LAvERN- of magnetic material, and the same is envcl- EDE, citizens of France, and residents of Paris, oped by the similarly flanged tube k. To

France, have invented a new and Improved these flanges, by screw-bolts passing through 55 Telephone, (for which we have obtained an the same, aresecured the mouth and ear pieces English patent, No. 3,763, dated August 8, tm, t forming the mouthpiece of the trans 1882, aFrench patent, No. 150,286, dated July mitter, and m the ear-piece of the receiver 25, 1882, and a Belgian patent, No. 58,628, end of the instrun'ient. A diaphragm, p, of

io dated July 31, 1882,) of which the following magnetic material, is secured between the 6o is a full and correct specification, reference month-piece and the body of the instrument, being had to the accompanying drawings, in suitable insulating-rings, n', being interposed which on either side'of said diaphragm, as usual.

Figure 1 isa longitudinal central section of Between the outer cnd of the body of the I our new telephone. Fig. 2 is a side view of instrument and the mouth-piece't is clamped 65 the same, showing it mounted on a support. a diaphragm, V, which must be of conducting Fig. 3 is a central longitudinal section of the material, and is preferably made of iron. A telephone, showing the transmitter and the recentral pin, VZ, connects this diaphragm with ceiver; and Fig. 4 is a detailed longitudinal a diaphragm, V, made of similar material,

zo section of part of instrument, which shows the which operates the microphone, as will pres- 7e manner of suspending the tubular magnets. ently appear.

The object of this invention is thcconstruc- Themicrophone consists oftwo carbon rings, tion of a combined microphone and m'agneto- 1/ y', separated l'rom each other by a number telephone without the use of a battery, the of carbon pins, z, which are pointed at both operative current heilig produced by magends and enter suitable depressions in the 75 neto-induction and modified 0r varied by the rings y y'. The ring 1/ is tixed to the shell lo, microphone, as will hereinafter appear. while ring 1/ is` loosely supported between In Fig. 1 of the drawings the details ofthe pins ,c and another series ot' pins, w, which construction of our improved implement are with their pointed ends enter small depresshown as follows: There are twoseriesofinsusions on the other side of the ring y, and So latedcoils,dddandgg'gg,thelatterseriessur1 similar depressions or holes near the edge rounding the former, but separated therefrom of diaphragm V. lVhile we have stated that byatubc, e, ofmagnetic material. In place of the pins and fw are made of carbon, we saitltubee,weniay useaseries ofmagneticwires have also tried selenium for this purpose.

collected to form an annulus surrounding the It will now be apparent that sound-waves im- 85 series of coils d d di. It will be understood pinging upon the diaphragm V will set the that the coils d d d2 are connected with each diaphragm V into vibration, and if the same other in series, although such connection is is made of magnetic material the approach to not indicated in the drawings. The same is and the recession from the end of magnet a of 4o true of the coils g g' g2. rEhe coils so consaid diaphragm will cause the series of mag- 9o nected are separated from each other by innets to participate in the movements of said sulating-rings c c. XVithin the inner series of diaphragm by reason of the magnetic attraccoils are arranged three sectional magnets, a tion between the same. At the same time the a a2, which are tubular and split longitudiedge of diaphragm V, acting through pins w nally, also separated from eachother by insuupon carbon ring y, will cause a correspond- 95 lating material, b b2. These magnets are coning -vihratory motion of the microphonic elenected with the interior of the coils d d d by ments, and any current which at the time may light exible structures, such as springs r, by pass through said microphone will be varied which they are held centrally,within said accordingly.

5o coils, but are allowed a lengthwise motion Two trunnions, M', secured to shell 7c, suproo port the whole instrument in bearingsprovided in one end of lever Z. Each lever is itself pivoted upon a standard, s, and is provided With a heavy knob, Z2, for reversing the instrument, as Will be presently explained.

To the face of each mouth-piece is secured an iron ring, q q', constructed to lit the end of an electro-magnet, x x', the coil of which, x', is in a signaling-circuit. ,Normally the receiving end of the telephone faces the end of magnet x', and if it is desired to communicate with a distant station the pressure of the hand upon knob Z2 will Withdraw said end of the instrument from the magnet, reversing the former and generating a momentary current in the coil of the electro-magnet, whereby a distant signaling apparatus is operated.

The speaking-circuits are as follows: In the left-hand side instrumentin Fig. 3 diaphragm V is connected with trunnion i', and with the ground by Wiresf. One end of the series of coils g g g? is connected lwith carbon ring y by Wire f 2, the other end of said series of coils being connected to trunnion z', and with the line by Wiresf4f5. Carbon ring g/ is also connected with one terminal of coils d d d2 by wiref, the other terminal of said coils being connected with trunnion z', and thereby to ground by Wire u. In the right-hand side instrument in Fig. 3 diaphragm V is connected with trunnion z' by wiref, and with the line by wire f5. Ring y is connected with one terminal of coils d d d'2 by Wiref, the other terminal being connected with trunnion i and ground by lWires fi. Said ring y is also connected with one terminal of coils g gg2 by Wire fl, the other terminal being connected by Wire u' with trunnion d, and thereby to the line.

The operation of the instrument will now be apparent. It will be seen that on the lefthand side coils d d' d2 are in the local circuit vwith the microphone and diaphragms, While coils y g g2 are in the line-circuit, Which also includes the microphone. On the right-hand side coils g g' gL are in a local circuit, including the microphone, While coils d d d2 are in the line-circuit, which also includes the microphone. Speaking against the transmitter end of any one of the instruments, the vibrations of the coils thereby induced will generate currents both in the local and in the line circuit. These currents will react upon each other, and will be modified by the microphone in accordance with the vibrations ofthe diaphragms. Thus modified, the current will reach the distant station, pass through one series of coils, and vary the magnetism of the cores of the instrument at that station, which in turn Will react upon the receivingdia` phragm.

We claim as our invention and desire to secure by Letters Patentl. A combined*magneto-telephone and microphone, consisting, essentially, of iiexible suspended magnets having endwise motion, a

receiving-diaphragm operated thereby, and a' transmittingdiaphragm operating the same,

in combination with a microphone operated by the transmitting-diaphragm, substantially as described.

2. A combined magneto-telephone and miin the line-circuit of the other coil of the inductorium, substantially as described.

3. A combined transmitter and receiver telephone, provided with ring-armatures at either end and reversibly mounted upon trunnions, an electro-magnet arranged in the line with said telephone and in inductive proximity to said armatures, and a singnalingcircuit including the coils of said magnet, substantiallys described.

JULES JOAS BARRIER. FERDINAND TOURVIEILLE DE LAVERNDE.

Witnesses:

A. BLTRY, RoBT. M. HooPER.

crophone, consisting of an inductorium having a iiexible suspended core, receiving and transmitting diaphragms in inductive proximity thereto, and a microphone both in the local circuit of one coil of the inductorium and 

